Add regression test for intra doc link type alias disambiguator for primitive

Author: GuillaumeGomez

tests/rustdoc-ui/intra-doc/type-alias-primitive.rs

@@ -0,0 +1,13 @@
+// Ensure that no warning is emitted if the disambiguator is used for type alias.
+// Regression test for <https://github.com/rust-lang/rust/issues/146855>.
+
+//@ check-pass
+
+#![deny(rustdoc::broken_intra_doc_links)]
+
+pub struct Foo;
+#[allow(non_camel_case_types)]
+pub type f32 = Foo;
+
+/// This function returns [`type@f32`]" and not [`prim@f32`].
+pub fn my_fn() -> f32 {}

tests/rustdoc/intra-doc/type-alias-primitive.rs

@@ -0,0 +1,14 @@
+// Ensure that no warning is emitted if the disambiguator is used for type alias.
+// Regression test for <https://github.com/rust-lang/rust/issues/146855>.
+
+#![crate_name = "foo"]
+
+pub struct Foo;
+#[allow(non_camel_case_types)]
+pub type f32 = Foo;
+
+/// This function returns [`type@f32`] and not [bla][`prim@f32`].
+//@ has 'foo/fn.my_fn.html'
+//@ has - '//a[@href="type.f32.html"]' "f32"
+//@ has - '//a[@href="https://doc.rust-lang.org/nightly/std/primitive.f32.html"]' "bla"
+pub fn my_fn() -> f32 {}